Here's a general outline of the process. Specific steps may vary slightly depending on your Silverado's specific model and trim level:
Safety First!
* Disconnect the battery negative terminal. This is crucial to prevent sparks that could ignite fuel vapors.
* Work in a well-ventilated area. Fuel fumes are highly flammable.
* Wear safety glasses and gloves.
* Have a fire extinguisher readily available.
Tools You'll Need:
* Socket wrench set (metric)
* Torque wrench
* Screwdrivers (Phillips and flathead)
* Fuel line disconnect tools (may need special pliers)
* Fuel pump pliers (optional, but helpful)
* Jack and jack stands
* Wheel chocks
* Drain pan
* Shop rags or absorbent cloths
* New fuel pump and gasket (ensure it's the correct one for your truck)
* Possibly a fuel pressure gauge (to check pressure before and after replacement)
Steps:
1. Lower the fuel tank: This is usually the most difficult part. You'll need to access the fuel tank straps and bolts. Consult your repair manual for the exact location and method. This typically involves lowering the tank from underneath the truck, requiring jack stands for safety.
2. Disconnect the fuel lines: This requires extreme caution. Use fuel line disconnect tools to carefully separate the fuel lines from the pump. Have rags ready to absorb any spilled fuel. Allow the lines to depressurize before disconnecting. You might hear a hissing sound as the pressure releases.
3. Disconnect the electrical connector: Unplug the fuel pump electrical connector.
4. Remove the fuel pump access panel: Most Silverados have an access panel on top of the tank, accessed from the bed of the truck. You may need to remove the bed access panel to access the fuel pump. Consult your repair manual for the exact location and method.
5. Remove the fuel pump assembly: This often involves removing a retaining ring, and then carefully lifting the pump assembly out of the tank. Take note of the order of parts during disassembly for correct reassembly.
6. Install the new fuel pump assembly: Carefully install the new fuel pump, gasket, and retaining ring, ensuring everything is seated correctly.
7. Reconnect the fuel lines and electrical connector: Securely reconnect all fuel lines and the electrical connector.
8. Raise the fuel tank: Carefully raise the fuel tank back into its position and secure it with the straps and bolts.
9. Reconnect the battery negative terminal.
10. Check for leaks: Inspect all fuel lines and connections for leaks.
11. Start the engine and check for problems: Listen for any unusual noises and check for fuel leaks. You might need to prime the fuel system by cycling the ignition switch a few times before cranking. You may need to drive the vehicle to ensure the fuel pump is functioning properly.
Important Considerations:
* Consult a Repair Manual: A factory service manual specific to your 1998 Chevy Silverado is invaluable. It will provide detailed diagrams, torque specifications, and step-by-step instructions. This is highly recommended.
* Fuel Pump Replacement Kits: Consider purchasing a fuel pump replacement kit, which often includes the pump, gasket, and other necessary parts.
* Fuel Pressure Testing: A fuel pressure gauge can help diagnose problems and confirm the fuel pump is working correctly after the replacement.
This is a simplified overview. The specific procedures will vary depending on your truck's configuration. Always prioritize safety and refer to a repair manual for detailed instructions. If you lack the experience or tools, hiring a professional mechanic is strongly recommended to avoid potential damage and injury.
